(Reuters) - Cisco Systems Inc said on Tuesday it plans to purchase cybersecurity company Sourcefire Inc for $2.7 billion, a deal that analysts say should spark more acquisitions in the industry as large vendors seek to profit from growing demand for IT security.Full story

This week investors expect earnings reports from DOW components, Cisco and Walmart as well as retailer Kohl's. It's also a huge week for economic data, with reports on small business, housing and inflation.

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A Cisco office is pictured in San Diego, California in this November 12, 2012 file photo. Cisco Systems Inc said it will buy software maker Sourcefire Inc for about $2.7 billion to increase its network security services. REUTERS/Mike Blake/Files (UNITED STATES - Tags: BUSINESS LOGO)

Cisco's logo is pictured at its office in San Diego, California, in this November 12, 2012 file picture. To match Special Report TAX-BIGTECH/ REUTERS/Mike Blake/Files (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY LOGO)